Maths Practice Question and Answer
8 Q: If x = 222, y = 223 and z = 224, then find the value of x3+y3+z3-3xyz
970 064872971b50f5316a455b8c6
64872971b50f5316a455b8c6- 12007true
- 22005false
- 32006false
- 42004false
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Answer : 1. "2007 "
Q: The minute hand of a clock is 20 cm long. Find the area on the face of the clock swept by the minute hand between 8 a.m. and 8:45 a.m.
970 06480419823e51f4777046b87
6480419823e51f4777046b87- 1$${6600\over 18}cm^2$$false
- 2$${6600\over 7}cm^2$$true
- 3$${6600\over 14}cm^2$$false
- 4$${6600\over 9}cm^2$$false
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Answer : 2. "$${6600\over 7}cm^2$$"
Q: If the price of sugar is increased by 20%, then by what percent should a housewife reduce its consumption so that no expenditure on it increases?
969 063109aced9ac741324b80ba4
63109aced9ac741324b80ba4- 116false
- 2$$16{2\over3}$$true
- 317false
- 4$$17{5\over3}$$false
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Answer : 2. "$$16{2\over3}$$"
Q: 50 grams of an alloy of gold and silver contains 80% gold by weight, how much more gold should be mixed in this metal so that the alloy contains 95% gold?
969 06318374c2d4ba278b6663cd4
6318374c2d4ba278b6663cd4- 110 gramsfalse
- 250 gramsfalse
- 3150 gramstrue
- 4200 gramsfalse
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Answer : 3. "150 grams"
Q: The elimination of θ from x cosθ-y sinθ=2 and x sinθ + ycosθ = 4 will give
969 06332e7fcbf6167733bdbb619
6332e7fcbf6167733bdbb619- 1true
x2+y2=20
- 2false
3x2+y2=20
- 3false
x2-y2=20
- 4false
3x2-y2=10
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Answer : 1. "x2+y2=20
"
Q: The average of x occurring 5 times and y occurring 7 times is 37. Also, the average of x occurring 7 times and y occurring 5 times is 35. The value of y is:
969 06489baf8bf323e479ab1a84f
6489baf8bf323e479ab1a84f- 145false
- 242true
- 330false
- 427false
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Answer : 2. "42"
Q: A supermarket has sales of ₹1,48,500, ₹2,00,000, ₹1,64,000, ₹1,88,600 and ₹2,40,400 in 5 consecutive months. How much sales should the supermarket have in the 6th month so that the average sales for these 6 months become ₹1,88,300?
969 0643d1ccf1ce944a93ea937b2
643d1ccf1ce944a93ea937b2- 1₹2,00,500false
- 2₹1,88,300true
- 3₹1,64,000false
- 4₹1,90,020false
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Answer : 2. "₹1,88,300"
Q: The base of a right pyramid is a square of side 10 cm. If its height is 10 cm, then the are (in cm2) of its lateral surface is:
969 064be612b874e2103e8cfb307
64be612b874e2103e8cfb307- 1$$50\sqrt { 5}$$false
- 2$$100$$false
- 3$$100\sqrt {5}$$true
- 4$$100\sqrt {5}+1$$false
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